Method of raising and lowering heavy objects



Feb. 6, 1951 H. RESTETSKY METHOD OF RAISING AND LOWERING HEAVY OBJ ECTSOriginal Filed April 25, 1946 FIG. 2.

INVENTO-R'. HERBERT RESTETSKY ATTORNEY Patented Feb. 6, 1951 METHOD OFRAI SIN G-AN D LOWE-BIN G HEAVY OBJECTS Herbert Restetsky, Maplewood,Mo.

Original application April 23, 1946, Serial No.

664,371. Divided and this application November 1, 1947, Serial No.783,526

2 Claims.

My invention has relation to improvements in methods of raising andlowering heavy objects. It is common practice in industrial plants tosuspend various industrial devices such as heating units, airconditioning units and related equipment from the ceilings by means ofsuspension rods. Since much of this apparatus is extremely heavy, theplacing of the apparatus and removin the same when necessary is anextremely difiicult operation. As far as I am aware this is now done byusing a block and tackle and various jacking up'devices.

I have devised an apparatus whereby an entirely new method is evolvedwhich greatly simplifies the operation of installing and removingapparatus of the type referred to; and that furthermore, may be operatedby one man.

Of course, the principal object of the present invention is to provide alabor saving device that is simple and efficient and at the same timeembodies the necessary safeguards to eliminate the possibility ofaccident. Other advantages of my invention will be better apparent froma detailed description thereof in connection with the accompanyingdrawings in which- Fig. 1 is an outline view of a heater suspended froma factory ceiling, with a. jack applied to one end thereof as thepreliminary step in my improved method; Fig. 2 shows the same heaterpartly lowered at one end with the apparatus employed in practicing themethod applied to the supporting rods for the heater; Fig. 3 is anenlarged detail of the apparatus employed in practicing my invention;and Fig. 4 is a further enlarged sectional detail of the thrust bearingand nut employed in my apparatus.

Referring to the drawings, I-I represents a heater unit suspended fromthe ceiling C of a factory or shop by suspension rods R, R according towell-known practice.

One common method of supporting such units H is to provide angle membersa, a extending from one end to the other on both sides of the unit H,which are perforated to receive the rods R, R over the threadedextremities e, e of which are securing nuts 11., n. Obviously, when theheater unit H is to be removed it must either be temporarily propped orit must be supported by a block and tackle before the nuts n, n areremoved.

In my improved method of raising or lowering the units H, I employ anycommon type of jack A and a sill S to temporarily jack up one end of theunit H so that the nuts 12, 71. may be removed so as to disengage theone end of the through the openings o in the heater from the supportingrods R, R. The jack A is then manipulated so as to allow the end of theheater that is being operated on to be dropped sufiiciently to entirelyclear the rods R, R from the angles a, a such as shown in Fig. 2.

It is now possible for me to apply the apparatus to the rods. R, R suchapparatus consisting of a coupling l whereby a threaded extension rod 2is securely connected to each of the rods R (Fig. 3). Obviously, at thistime the end of the heater being Worked on is still supported by thejack A. The extension rods 2 are passed angle member a and a thrustbearing 3 is passed over the extension rod 2 and held in engagement withthe angle member a by a handle nut 4 which traverses the extension rod2. I

When both rods R, R at one end of the unit H have been thus supported onthe extension rods 2 the opposite end of the unit H is handled in a likemanner, so that the heater unit is finally supported entirely on fourthrust bearings, one at each corner of the heater.

The operator may now manipulate the handle nuts l more or lesssynchronously so that the -heater will be lowered at each of its fourcorners approximately simultaneously. The extension rods 2 may be of anydesired length, depending upon the height of the ceiling C, from whichthe heater H is suspended; however, should the ceiling be exceptionallyhigh it might be advisable to add a second extension rod to the firstextension rod in a manner similar to that in which the first rod 2 iscoupled to the suspension rod R.

It should be apparent that in raising a heater unit or equivalent pieceof apparatus f-orattachment to suspension rods R, R the operation justdescribed is reversed, that is; instead of lowering the unit H on therods 2, 2 said unit will be raised thereon by a proper manipulation ofthe handle nuts 4.

Having described my invention, I claim:

1. A method of moving upwardly or downwardly heavy objects suspendedfrom rods which comprises temporarily propping said object by an.adjustable prop, coupling threaded extension rods to the suspension rodswhile propped, applying supportin nuts to the extension rods, removingsaid prop, and successively rotating said supporting nuts to eitherraise or lower said object.

2. The method of lowering heavy objects suspended from threaded rods,which comprises temporarily propping said object at one end byREFERENCES CITED an adjustable .prop, releasing said object from therods at said end, coupling threaded extenzi, fi i z are of record in thesion rods to the suspension rods, applying supporting nuts for theobject to the extension rods, 5 UNITED STATES PATENT s removing the propto p r the Object to rest Number Name Date on said supporting nuts,repea ing ai ep at 1,801,377 Sutliff Apr. 21, 1931 the other end of theobject, and succ iv ly 2,089,871 Adams Aug. 10, 1937 withdrawing saidsupporting nuts, step by step, to permit the object to descend over theexten- 10 sion rods.

HERBERT RESTE'ISKY.

